1. Introduction
The Riland MIG-251 GE is an industrial-grade, dual-purpose welding machine designed for both MIG (Metal Inert Gas) and MMA (Manual Metal Arc) welding operations. It incorporates advanced IGBT inverter technology for stable output current and high efficiency. This portable and energy-saving welder is suitable for a wide range of applications, from sheet metal processing to heavy industrial use.
2. Safety Information
Always prioritize safety when operating welding equipment. Read and understand all safety warnings and instructions before use. Ensure proper ventilation, wear appropriate personal protective equipment (PPE) including welding helmet, gloves, and protective clothing. Keep a fire extinguisher nearby. Do not operate the machine in wet conditions or near flammable materials.
- Ensure the work area is well-ventilated to reduce dust and smoke inhalation.
- Wear a welding helmet with appropriate shade, welding gloves, and protective clothing.
- Avoid direct exposure to arc light and sparks. The low arc function helps weaken infrared and ultraviolet light.
- Do not touch live electrical parts.
- Ensure the machine is properly grounded.
- In case of over-temperature or over-current, the machine will automatically stop for protection. Allow it to cool down before resuming operation.
3. Product Overview
The Riland MIG-251 GE is a compact and portable welding machine. It features a robust design suitable for industrial environments.
This image displays the front panel of the Riland MIG-251 GE welding machine, highlighting the control knobs for current, voltage, and inductance, along with the output terminals for welding cables.
The rear view of the welder shows the power input cable, cooling vents, and the 'GAS IN' connection point for gas-shielded welding.
Key Features:
- Advanced Inverter Technology: Utilizes IGBT inverter technology for stable output current and beautifully formed weld seams.
- High Efficiency and Energy Saving: Power conversion efficiency is significantly improved compared to traditional welding machines, reducing user costs.
- Lightweight and Easy to Carry: Compact design makes it suitable for mobile operations across various work environments.
- Over-temperature and Over-current Protection: Built-in safety mechanisms automatically stop operation if internal temperature or current exceeds safe limits, protecting both the equipment and operator.
- Dual-Purpose Welding: Supports both MIG (Gas Shielded Welding) and MMA (Manual Metal Arc) welding. It also supports gasless MIG welding.
- Adjustable Controls: Features three adjustable knobs for current, voltage, and inductance.
- Smart Chip Technology: Equipped with a Riland smart chip for one-button adjustment and automatic parameter matching, simplifying operation for beginners.
- High-Quality Wire Feeding Device: Ensures smooth and continuous wire feeding for uninterrupted welding.
4. Specifications
| Attribute | Value |
|---|---|
| Product Model | MIG-251 GE |
| Type | Hand Tool Parts |
| Origin | Mainland China |
| Material / Metal Processed | Carbon steel |
| Rated Input Voltage | 220V ±15% |
| Rated Input Capacity | 5.6KVA |
| Frequency | 50/60Hz |
| No-load Voltage | 56V |
| Wire Melting Type | Short Circuit Transfer |
| Rated Output Current (MIG) | 40-90A |
| Rated Output Current (MMA) | 40-90A |
| Rated Output Voltage (MIG) | 61V |
| Rated Duty Cycle @40°C (MIG) | 20% |
| Welding Wire Diameter | 0.8mm |
| Wire Feeding Speed | 15 m/min |
| Insulation Class | Class F |
| Protection Level | IP21S |
| Dimensions (L*W*H) | 315*135*240mm |
| Product Weight | 4.4 KG |
| Package Dimensions | 390*240*390mm |
| Package Weight | 5.8kg |
| Condition | New |
| Use | Welding |
| Key Selling Points | Easy to Operate |
| Machinery Test Report | Provided |
| Video outgoing-inspection | Provided |
| Feature | Gasless |
| Product Name | Carbon Dioxide Gas Shielded Welding Machine |
| Color | Blue |
5. Setup
5.1 Unpacking and Inspection
- Carefully remove the welding machine and all accessories from the packaging.
- Inspect the machine for any signs of damage during transit. If damaged, contact your supplier immediately.
- Verify that all standard accessories are present: 1 matching welding gun, 1 ground wire.
5.2 Power Connection
- Ensure the power switch on the welder is in the OFF position.
- Connect the welder to a 220V ±15% power supply. Ensure the power outlet is properly grounded and can handle the rated input capacity of 5.6KVA.
The rear view of the welder (Figure 2) shows the power input cable connection.
5.3 Welding Cable Connections
- Ground Clamp: Connect the ground clamp cable to the appropriate terminal on the front panel (usually marked with a ground symbol or '-'). Secure the ground clamp to the workpiece, ensuring good electrical contact.
- MIG Welding Gun: Connect the MIG welding gun to the designated connector on the front panel. Ensure it is securely fastened.
- MMA Electrode Holder (if applicable): For MMA welding, connect the electrode holder cable to the positive (+) terminal and the ground clamp to the negative (-) terminal.
5.4 Gas Connection (for MIG Gas Shielded Welding)
- For gas-shielded MIG welding, connect your CO2 gas cylinder to the 'GAS IN' port located at the rear of the machine (refer to Figure 2).
- Ensure all gas connections are tight and leak-free.
- If performing gasless MIG welding, this step can be skipped as the machine supports it.
5.5 Welding Wire Installation
- Open the wire feeder compartment.
- Install the appropriate welding wire (0.8mm recommended) onto the spool holder.
- Thread the welding wire through the wire feeder mechanism and into the welding gun liner. Ensure the wire feeds smoothly.
6. Operating Instructions
6.1 Powering On
- Once all connections are secure, turn the main power switch to the ON position.
- The machine's display (if present) should light up, indicating it is ready for operation.
6.2 Mode Selection and Parameter Adjustment
- Select the desired welding mode (MIG or MMA) using the control panel.
- Adjust the welding parameters using the three knobs:
- Current: Controls the welding current (40-90A for both MIG and MMA).
- Voltage: Controls the welding voltage (61V rated output for MIG).
- Inductance: Fine-tunes the arc characteristics for MIG welding.
- For beginners, the Riland smart chip offers one-button adjustment and automatic parameter matching to simplify setup.
6.3 Welding Process
- MIG Welding:
- Ensure gas flow is set correctly (if using gas-shielded MIG).
- Position the welding gun at the starting point of the weld.
- Press the trigger to initiate the arc and wire feed.
- Maintain a consistent travel speed and arc length for optimal weld quality.
- The high-quality wire feeding device ensures smooth and non-stop welding.
- MMA Welding:
- Strike the electrode against the workpiece to initiate the arc.
- Maintain a consistent arc length and travel speed.
- The machine's stable output current helps in achieving good welding quality.
6.4 Post-Welding
- Release the welding gun trigger or lift the electrode from the workpiece to stop welding.
- Allow the workpiece to cool before handling.
- Turn off the gas supply (if used).
- Turn off the main power switch on the welder.
7. Maintenance
Regular maintenance ensures the longevity and optimal performance of your Riland MIG-251 GE welder.
- Cleaning: Regularly clean the exterior of the machine to prevent dust and debris buildup, especially around cooling vents. Use a dry, soft cloth.
- Internal Cleaning: Periodically, and with the machine unplugged, use compressed air to blow out dust from inside the machine. This should be done by qualified personnel.
- Cable Inspection: Inspect all welding cables, power cords, and gas hoses for wear, cuts, or damage before each use. Replace damaged components immediately.
- Wire Feeder: Keep the wire feeder mechanism clean and free of debris. Check the wire feed rollers for wear and replace if necessary.
- Welding Gun: Clean the welding gun nozzle, contact tip, and diffuser regularly. Replace worn parts to ensure consistent arc performance.
- Storage: Store the welder in a clean, dry environment, away from moisture and extreme temperatures.
8. Troubleshooting
This section provides solutions to common issues you might encounter.
| Problem | Possible Cause | Solution |
|---|---|---|
| Machine does not power on | No power supply; Faulty power cord; Internal fuse blown | Check power outlet and circuit breaker; Inspect power cord; Contact service for fuse replacement. |
| Welder stops during operation | Over-temperature or over-current protection activated | Allow the machine to cool down. Reduce duty cycle or welding current. Ensure proper ventilation. |
| Poor arc stability / No arc | Poor ground connection; Incorrect welding parameters; Worn contact tip/electrode; No gas flow (MIG) | Ensure ground clamp has good contact; Adjust current/voltage; Replace contact tip/electrode; Check gas cylinder and flow rate. |
| Wire feeding issues (MIG) | Wire tangled; Worn wire feed rollers; Incorrect tension; Blocked liner | Untangle wire; Clean/replace wire feed rollers; Adjust tension; Clean/replace gun liner. |
9. Applications
The Riland MIG-251 GE welder is versatile and suitable for a wide range of industrial and professional applications:
- Sheet metal processing
- Aluminum alloy processing
- Handicraft processing
- Vehicle manufacturing
- Household installation
- Construction industry
- Engineering machinery processing
- Shipbuilding
- Steel structure fabrication
- Petrochemical industry
- Container manufacturing
- Aerospace
- Electronic manufacturing industry
This image illustrates the diverse environments and industries where the Riland MIG-251 GE welder can be effectively utilized, from heavy construction to precision manufacturing.
10. Warranty and Support
10.1 Product Warranty
The Riland MIG-251 GE welder comes with a 1-year warranty from the date of purchase. This warranty covers manufacturing defects and malfunctions under normal use. Please retain your proof of purchase for warranty claims.
10.2 After-Sales Service and Guarantees
In addition to the product warranty, the seller provides the following service commitments:
- Free Returns: Free returns are available within 90 days of purchase.
- Fast Delivery Guarantee:
- $1.00 coupon code if delivery is delayed.
- Full refund if the package is lost.
- Full refund if items are damaged upon arrival.
- Full refund if no delivery within 30 days.
- Security & Privacy: Your personal details are protected and not shared with third parties without consent.
10.3 Contact Information
For technical support, warranty claims, or any inquiries, please contact the seller:
- WhatsApp/WeChat: Aida +86 15381935847
- Email: yihua.aida@gmail.com
11. Certifications
The Riland MIG-251 GE welder is manufactured under strict quality control and holds the following certifications:
This image displays the Quality Management System Certificate, Attestation of Compliance, and Electromagnetic Compatibility Directive Attestation of Conformity, indicating the product meets international standards.
